Electricity in the home Flashcards by Eva Heyworth

Q

Alternating current?

A

Changes direction

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Q

What type of current is mains current?

A

Alternating

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Q

What is the pd of mains electricty?

A

230 V

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Q

What is the frequency of mains electricty?

A

50 Hz

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Q

Direct current?

A

Flows in one direction only

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Q

Where is direct current from?

A

Batteries and photovoltaic cells

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Q

How many wires does a 3 pin plug have?

A

3

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Q

What is the brown wire in a plug?

A

Live

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Q

What colour is the neutral wire?

A

Blue

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Q

What colour is the earth wire?

A

Green and yellow striped

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Q

What does the earth wire do?

A

Protects against electric shocks if there is a fault

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Q

What is the fuse attached to?

A

The live wire

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Q

What does the fuse do?

A

Melts if the current gets too high

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Q

What are the fuse ratings?

A

3,5 and 13

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Q

Which fuse do you choose?

A

The one that is higher than the current needed

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